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Enhance OpenGLBuffer with more buffer types and features

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- Add OpenGLBufferType enum (Vertex, Index, Uniform, CopyRead, CopyWrite, etc.)
- Add Initialize() method with buffer type parameter
- Add Map/Unmap for direct buffer access
- Add SetData for dynamic updates
- Add BindBase for buffer binding to indexed targets
- Add GetType and IsDynamic getters
This commit is contained in:
ssdfasd
2026-03-17 02:08:49 +08:00
parent 4c9c03e1a7
commit 56c32bfbde
2 changed files with 90 additions and 20 deletions
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88
engine/src/RHI/OpenGL/OpenGLBuffer.cpp
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@@ -6,32 +6,56 @@
namespace XCEngine {
namespace RHI {
static unsigned int ToGLBufferTarget(OpenGLBufferType type) {
switch (type) {
case OpenGLBufferType::Vertex: return GL_ARRAY_BUFFER;
case OpenGLBufferType::Index: return GL_ELEMENT_ARRAY_BUFFER;
case OpenGLBufferType::Uniform: return GL_UNIFORM_BUFFER;
case OpenGLBufferType::CopyRead: return GL_COPY_READ_BUFFER;
case OpenGLBufferType::CopyWrite: return GL_COPY_WRITE_BUFFER;
case OpenGLBufferType::AtomicCounter: return GL_ATOMIC_COUNTER_BUFFER;
case OpenGLBufferType::DispatchIndirect: return GL_DISPATCH_INDIRECT_BUFFER;
case OpenGLBufferType::DrawIndirect: return GL_DRAW_INDIRECT_BUFFER;
case OpenGLBufferType::ShaderBindingTable: return GL_SHADER_STORAGE_BUFFER;
default: return GL_ARRAY_BUFFER;
}
}
OpenGLBuffer::OpenGLBuffer()
: m_buffer(0)
, m_size(0)
, m_isIndexBuffer(false) {
, m_isIndexBuffer(false)
, m_dynamic(false)
, m_type(OpenGLBufferType::Vertex) {
}
OpenGLBuffer::~OpenGLBuffer() {
Shutdown();
}
bool OpenGLBuffer::InitializeVertexBuffer(const void* data, size_t size) {
glGenBuffers(1, &m_buffer);
glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
bool OpenGLBuffer::Initialize(OpenGLBufferType type, size_t size, const void* data, bool dynamic) {
m_type = type;
m_size = size;
m_isIndexBuffer = false;
m_dynamic = dynamic;
m_isIndexBuffer = (type == OpenGLBufferType::Index);
unsigned int target = ToGLBufferTarget(type);
GLenum usage = dynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
glGenBuffers(1, &m_buffer);
glBindBuffer(target, m_buffer);
glBufferData(target, size, data, usage);
glBindBuffer(target, 0);
return true;
}
bool OpenGLBuffer::InitializeVertexBuffer(const void* data, size_t size) {
return Initialize(OpenGLBufferType::Vertex, size, data, false);
}
bool OpenGLBuffer::InitializeIndexBuffer(const void* data, size_t size) {
glGenBuffers(1, &m_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
m_size = size;
m_isIndexBuffer = true;
return true;
return Initialize(OpenGLBufferType::Index, size, data, false);
}
void OpenGLBuffer::Shutdown() {
@@ -42,19 +66,43 @@ void OpenGLBuffer::Shutdown() {
}
void OpenGLBuffer::Bind() const {
if (m_isIndexBuffer) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
} else {
glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
}
unsigned int target = ToGLBufferTarget(m_type);
glBindBuffer(target, m_buffer);
}
void OpenGLBuffer::Unbind() const {
if (m_isIndexBuffer) {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
unsigned int target = ToGLBufferTarget(m_type);
glBindBuffer(target, 0);
}
void OpenGLBuffer::BindBase(unsigned int target, unsigned int index) const {
glBindBufferBase(target, index, m_buffer);
}
void* OpenGLBuffer::Map() {
unsigned int target = ToGLBufferTarget(m_type);
glBindBuffer(target, m_buffer);
void* ptr = glMapBuffer(target, GL_WRITE_ONLY);
glBindBuffer(target, 0);
return ptr;
}
void OpenGLBuffer::Unmap() {
unsigned int target = ToGLBufferTarget(m_type);
glBindBuffer(target, m_buffer);
glUnmapBuffer(target);
glBindBuffer(target, 0);
}
void OpenGLBuffer::SetData(const void* data, size_t size, size_t offset) {
unsigned int target = ToGLBufferTarget(m_type);
glBindBuffer(target, m_buffer);
if (offset == 0 && size == m_size) {
glBufferData(target, size, data, m_dynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
} else {
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBufferSubData(target, offset, size, data);
}
glBindBuffer(target, 0);
}
} // namespace RHI